Honeywell 2108N4000H Combustible Gas Detector

ฮันนี่เวลล์ Searchpoint Optima Plus (2108N4000H) ความผิดพลาด & Warning Troubleshooting Table

Reading methods: ฮาร์ท 475/375 Communicator, SHC1 Handheld Interrogator, EDD Device Description File; W=Warning, F=Fault. Under fault condition, output defaults to 0mA (this HART version can be set to 1mA). Some faults are latched and require manual clearing or power cycle reset.

📌 Common General Faults (No independent Error ID in HART)

1. HART Communication Failure

ตรวจสอบ: 250Ω HART resistor must be installed on the loop; correct polarity; single-end shield grounding; no excessive non-HART devices on the bus; matching baud rate.

2. Slow reading drift with no error code

ตรวจสอบ: overdue calibration; clogged dust filter; continuous low-level hydrocarbon interference; heavy oil adsorption inside gas cell.

3. No current output & no communication after power-on

ตรวจสอบ: น้ำเข้า & terminal corrosion in M25 junction box; burnt circuit due to reverse polarity; ฟิวส์ภายในขาด.

🛠️ Operation Guidelines (for 2108N4000H)

1. Clear Latched Faults: HART menu →【Fault/Warning】→Clear; or power off ≥30 seconds then restart. Hardware faults will reoccur immediately after reset; do not mask them permanently.
2. Calibration Precondition: Clear all optical path & lamp warnings before zero/span calibration; calibration will drift severely with active optics contamination warning.
3. Spare Parts Division: ข้อผิดพลาด 8,11,16 = optical module (โคมไฟ + detector + lens); Error5,13,22 = main board failure. Board-level repair is not recommended; replace the whole transmitter directly.
4. SIL2 Reminder: F-class faults trigger SIL safety loop action. Do not run the detector with fault masked for long; rectify promptly.

(Searchpoint Optima Plus)

ตำแหน่งผลิตภัณฑ์: Point-type NDIR hydrocarbon combustible gas detector, HART protocol version

Manufactured by Honeywell Analytics UK. NDIR infrared principle, immune to catalytic bead poisoning. Ideal for offshore platforms, refineries, LNG and other harsh environments; SIL2 safety integrity level.

✅ Model Coding Definition

2108: Searchpoint Optima Plus series

เอ็น: Hydrocarbon HC version (มีเทน, propane, gasoline etc., โมเดลของคุณ)

4: Standard diffusion type with weather shield

000: Without remote gas cell & sampling path

ชม: ฮาร์ท 7 protocol superimposed on 4-20mA signal (suffix N = pure 4-20mA without HART, เช่น. 2108N4100N)

ด้าย: M25 (distinguished from 41xx series with 3/4″เธรด NPT)

การกำหนดค่ามาตรฐาน: 316L electropolished stainless steel housing, dust filter, nylon weatherproof cover, sunshade against rain splash.

📌 Key Technical Specifications

✨ Infrared vs Catalytic Bead Advantages

1. Resistant to catalytic poisons (ซิลิโคน, lead, H₂S), longer service life and extended maintenance interval
2. Fail-safe optical self-test; no silent failure risk
3. Works normally in inert atmosphere (catalytic sensors require oxygen)
4. Built-in temperature control heating; anti-condensation optical window; pre-warning for lens contamination
5. Onboard event log; support HART communicator for commissioning, calibration and diagnostics

🧾 Typical Application Scenarios

Offshore oil & gas platforms, FPSO, oil tankers, refineries, LNG/LPG filling stations, gas regulator stations, gas turbine power plants, solvent coating & printing workshops, tank farms.

📎 Cross-model Reference (for replacement & การเลือก)

2108N4000H: M25 thread, ฮาร์ท, diffusion type with weather shield (your unit)

2108N4100N: 3/4″เอ็นพีที, pure 4-20mA, ไม่มีฮาร์ท

2108N4100H: 3/4″เอ็นพีที, เวอร์ชั่นฮาร์ท

2108N5100H: Flow-through sampling type with HART, for pipeline sampling systems

⚠️ Important Notes

1. Infrared detector only responds to hydrocarbons; cannot detect non-hydrocarbon flammable gases such as H₂, บจก, NH₃.
2. Calibration gas must match target gas; response factor varies for different hydrocarbons.
3. Cannot directly replace catalytic bead sensors without rechecking host logic and alarm thresholds.
4. Consumable spare parts: optical module, dust filter and weather shield are regular wear items.

Honeywell Searchpoint Optima Plus (2108 ชุด) รายการรุ่นเต็ม

1. กฎการเข้ารหัสโมเดล

2108เอ็น: Standard Hydrocarbon (HC) รุ่น (มีเทน, propane, gasoline etc.)

2108บี: Ethylene & solvent dedicated version (ethylene, aromatics, esters)

4หลักที่: 4 = Diffusion type; 5 = Flow-through sampling type (with gas cell)

Thread code: 0 = M25; 1 = 3/4″เอ็นพีที

คำต่อท้าย: N = 4-20mA only; H = 4-20mA + HART7 protocol

คำต่อท้าย 10 = with Remote Gas Cell (RGC); 00 = without remote gas cell

2. 2108N Hydrocarbon Standard Models (Main Series, including 2108N4000H)

2.1 M25 thread (0) | Diffusion (4) | No RGC (00)

1. 2108N4000N: 4-20มิลลิแอมป์, M25, diffusion, weather shield
2. 2108N4000H: 4-20mA+HART, M25, diffusion (โมเดลของคุณ)
3. 2108N4001N: Ethylene calibrated, M25, diffusion, 4-20มิลลิแอมป์
4. 2108N4001H: Ethylene calibrated, M25, diffusion, ฮาร์ท
5. 2108N4010N: HC + RGC remote test cell, M25, diffusion
6. 2108N4010H: HC + RGC, M25, diffusion, ฮาร์ท

2.2 3/4″เธรด NPT (1) | Diffusion (4) | No RGC (00)

7. 2108N4100N: 4-20มิลลิแอมป์, เอ็นพีที, diffusion
8. 2108N4100H: 4-20mA+HART, เอ็นพีที, diffusion
9. 2108N4110N: With RGC, เอ็นพีที, diffusion
10. 2108N4110H: With RGC, เอ็นพีที, diffusion + ฮาร์ท

2.3 Flow-through sampling type (5) for sampling pipeline & pre-treatment systems

M25 thread (0)

11. 2108N5000N: Flow gas cell, M25, 4-20มิลลิแอมป์
12. 2108N5000H: Flow gas cell, M25, ฮาร์ท
13. 2108N5010N: Flow type + RGC, M25
14. 2108N5010H: Flow type + RGC, M25 + ฮาร์ท

3/4″เธรด NPT (1)

15. 2108N5100N: Flow gas cell, เอ็นพีที, 4-20มิลลิแอมป์
16. 2108N5100H: Flow gas cell, เอ็นพีที, ฮาร์ท
17. 2108N5110N: Flow type + RGC, เอ็นพีที, high concentration range (0~100%vol CH₄)
18. 2108N5110H: Flow type + RGC, เอ็นพีที + ฮาร์ท

2.4 Special XTC Marine & Multi-certified Models (44/46/48 ชุด)

19. 2108N4400N / ชม: Diffusion, การรับรองทางทะเล, M25
20. 2108N4600N / ชม: Diffusion, UL/FM certified, M25
21. 2108N4601N / ชม: Ethylene calibrated, 46-type diffusion
22. 2108N4800N / ชม: Optima Plus XTC version, M25 diffusion
23. 2108N5400/5600/5800 N/H: Corresponding flow-through versions (44/46/48 sampling models)
24. 2108B Ethylene & Solvent Dedicated Models (for Optima X/Z sampling systems)

Diffusion type (4)

1. 2108B4001N / ชม: Ethylene calibrated, M25 diffusion
2. 2108B4101N / ชม: Ethylene calibrated, NPT diffusion

Flow-through sampling type (5, only for sampling systems)

3. 2108B5001N / ชม: Ethylene flow cell, M25
4. 2108B5101N / ชม: Ethylene flow cell, เอ็นพีที
5. 2108B2001N / ชม: Optima X fast-response sampling model (special gas cell)
6. 2108B2051N: DNV marine certified version
7. Full Series Spare Part Order Codes
8. Optical Module: 2108D3001 (Methane), 2108D3034 (Ethylene)
9. Remote Gas Cell (RGC): 2108B0240
10. Flow-through Gas Cell Assembly: 2108B0282
11. Dust Filter + Weather Shield: 2108B2337
12. เทอร์มินัล & Junction Box: 2108B2360
13. ตารางการเลือกด่วน (for replacement)

6. หมายเหตุเสริม
7. N = 4-20mA analogue only; H = HART enabled. Do not mix loop types; 250Ω resistor is mandatory for HART loops.
8. 2108N only detects hydrocarbons; 2108B is dedicated for ethylene, esters and alcohols. Neither can detect H₂, CO or NH₃.
9. All models meet SIL2, ATEX/IECEx/FM certification; IP67 ingress protection.